Which event allowed Britain to focus its military resources on fighting the United States? A) The war with France was over. B) Their national economy was thriving. C) The invention of the water frame D) Many Spanish soldiers joined the British army.
For the second question you asked "
Why did Napoleon sign a treaty with the U.S. in 1810 agreeing to respect the neutrality rights of the U.S.?" I would say:
"He hoped this would hurt Britain."